#include"stack.h"
#include"dynamic.h"
#include<stdio.h>


int main()
{
  int x = 19;
  int y = 12;


  printf("%d\n",add(x,y));
  printf("%d\n",sub(x,y));
//  printf("%d\n",mult(x,y));
//  printf("%f\n",div(x,y));
}
